Open source software, like Krita, has some challenges when it comes to helping professional graphic designers. Let's look at a few of these issues:

• Limited Features: It often doesn't have all the advanced tools that paid software offers.
• Compatibility Issues: It might have trouble working with different file types or teaming up with others.
• Steep Learning Curve: It can take a lot of time to learn how to use it well.

But don't worry! There are ways to deal with these challenges:

1. You can go to workshops to learn new skills.
2. You can reach out to community forums for help and advice.
3. You can check out plugins that add extra features to improve what you can do with the software.